A two-piece soft metal pipe flashing penetrates a multiple-ply modified bitumen roof membrane, with the top of the flashing rolled into the pipe approximately one inch and left unfastened to allow for building movement. The flashing flange is set in compatible roof cement with a four-inch minimum dimension, primed before applying a modified bitumen membrane stripping ply. Compatible roof cement or sealant is applied at the penetration to membrane juncture. For roof systems with factory-applied granule surfacing, the pipe flashing flange and multi-ply membrane stripping can be installed between the base ply and granule-surfaced sheet.
SET FLANGE IN COMPATIBLE ROOF CEMENT (FOR ROOF SYSTEMS WITH FACTORY-APPLIED GRANULE SURFACING, THE PIPE FLASHING FLANGE AND MULTI- PLY MEMBRANE STRIPPING CAN BE INSTALLED BETWEEN THE BASE PLY AND GRANULE-SURFACED SHEET) MULTIPLE-PLY MODIFIED BITUMEN ROOF MEMBRANE 4" MIN. FLANGE MIN. 4" COMPATIBLE ROOF CEMENT OR COMPATIBLE SEALANT AT PENETRATION TO MEMBRANE JUNCTURE MODIFIED BITUMEN MEMBRANE STRIPPING PLY - PRIME FLANGE BEFORE STRIPPING 2-PC SOFT METAL PIPE FLASHING TOP OF FLASHING ROLLED INTO PIPE APPROX. 1" DO NOT FASTEN TO CAP TO ALLOW FOR BUILDING MOVEMENT 1 1/2" = 1'-0" 9 DETAIL, EXT - EQUIPMENT CURB
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